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Modular Class A Buffer preamplifier circuit
A unit which is often very useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do not use total negative feedback, only local, with the result that distortion remains at a very low level. Matching must be done with great care to the types of...
How to build Modular Class A Buffer preamplifier
A unit which is often very useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do not use total negative feedback, only local, with the result that distortion remains at a very low level. Matching must be done with great care to the types of transisto
A Bidirectional Level-Shifting Buffer for Raspberry Pi
The current sourcing/sinking capability of the I/O pins on Raspberry Pi is quite limited. According to the Wiki page, the current limit for each I/O block (e. g. GPIO0 through GPIO27 combined) comes at only 26 mA maximum, which is only capable of driving a couple of LEDs at a time. Also the I/O pins are 3. 3V only, and going beyond the current or v
Super Buffer for Guitars
There are situations in which very long cable runs are necessary from the pedalboard to the amplifier, or a more powerful driving circuit is needed to the heavy load presented by devices in parallel. A good buffer box is the solution. The best buffer board will present a high impedance to the input while having a low impedance output. This insures
Boosters Are Not Buffers
Boosters are not buffers! While it is possible to make a booster that also provides a buffering action, the vast majority of the boosters commercially available ready-made or kits, do not have the proper design to be buffers. A buffer should have a high input impedance (Z) and a low output impedance. The LPB1, shown at the top of this post, has a
Leaky Transistor Buffer
The wah will work before the amplifier but sounds very low in volume and it sounds scratchy when the wah is rocked back and forth. The wah is fine without the buffer. In front of a fuzz face, with the fuzz face on, no sound passes Bizarre indeed. I`m going to go back to it and if I wired something wrong. Does the leakage and bias matter with the...
Multi-Purpose Booster and Buffer
This is the complete schematic for the circuit that is contained on the AMZ Multi-Purpose PC Board. None of the example circuits will utilize every part that has been positioned on the board. Extra parts have been included to add flexibility and options to the boards. The basic idea is to create a single pc board that can be used to make multiple
2 transistor buffer
When designed with general purpose small-signal transistors, the bandwidth is 50MHz to 250MHz so very careful grounding and power supply decoupling is required. Simulation schematic for 2 transistor buffer. *Copyright Poul Petersen 2009 * *Some standard Spice stuff.
TMB-1 Tri-Mode Buffer Amplifier Box
The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas. This particular design is optimized for 0. 5 to 2. 0 MHz operation (medium wave broadcast and 160-m amateur). Sensitivity is...
It`s basically a standard Hartley oscillator, output is +7 dBm into 50 Ohms. Don`t be tempted to add a gate diode, this circuit doesn`t need it, and it will degrade the phase noise performance, according to Ulrich Rohde. It should be suitable for any frequency up to 10 MHz or more (depending on how good you are at making drift-free oscillators)...
Two-Stage JFET Preamp/Booster
This circuit makes a nice, clean preamp or a clean booster pedal. It is not designed for overdrive, but is designed to be overdrivable. If overdriven, it provides the kind of soft clipping one may expect from JFETs, but it is not optimized to be generally used as an overdrive effect. This design started out as an idea for a booster pedal circuit u
MD1 audio w/ mCD & 32x buffer amp circuit
Need some program to set it`s channels to the maximum level, or write the full scale to the DAC. Looking at the MD schematics, you`ll see that the audio is mixed together with relations of 0. 0431 for the PSG, 1 for the YM and 0. 0468 for the external audio sources (both 32x and CD) What I did with my audio amp was tapping all signals before...
A Ph Probe Buffer Amplifier
Buffer amplifier is required by a typical pH probe to isolate its 10^6 to 10^9 ohm source resistance from external circuitry. Such an amplifier is shown in the..
Buffering TMP01 Temperature Sensor
This is a buffer circuit for TMP01 Temperature Sensor. The output of this sensor is a low impedance dc output voltage with a 5 mV/K temperature coefficient..
Transistor Buffer for Zener Diode Voltage Regulator
Buffering for the zener is provided by the impedance matching and current amplifying characteristics of the emitter follower and draw less current from it. To..
Phantom powered FET preamp cable with output buffer
This is a phantom-powered FET preamplifier built into a 1/4" guitar cable, similar to the one on the Tillman site. There are only a couple of parts to the amplifier, so the difficulty was being able to trim and solder component leads to fit within the space of a 1/4" plug. The phantom-power end of the cable plugs into a small Hammond 1590A box....
Pro Co Rat Input & Output Buffers Guitar
In some versions you don`t have the input buffer at all, and in some versions the buffer transistors have different biasing or different transistors. Some have even BIG errors. Errorswith the biasing, errors with the transistor symbols. I understand that the devices are symmetrical, and that means it really doesn`t matter which way you connect...
Tube-based Buffer amplifier
The solid-state, unity-gain power buffer is easy to imagine, as many already exist. But what about corresponding tube equivalents Have they been made Could one be made Actually, super cathode followers (complex-and-augmented cathode followers with a gain of 0. 99) have a long history, with many interesting designs appearing in the 1940s and 1950
Spectrum Keyboard Buffer
Most people who want to modify and improve their Spectrum look first at the keyboard as a prime area for change. But straightforward replacement involves digging around inside the computer - something of a put-off, for two important reasons. To begin with it might nullify the guarantee from Sinclair and, frankly, there`s just no-one else around...
Iso buffer serial to parallel converter
Using this circuit you will connect to a single parallel port electronic circuits requiring up to 96 digital output, optically insulated lines, 3 to 15V powered. The CD4094B consists of an 8-bit shift register and a 8-bit latch. Data is shifted serially through the shift register on the positive transition of the clock. The output of the last stag
555 Timer Circuits
RC Model Toy Circuits
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Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity